def shift_old_hsv(image: QImage, dh, ds, dv):
for x in range(image.width()):
yield x
for y in range(image.height()):
color = image.pixelColor(x, y)
h, s, v, a = color.getHsv()
color.setHsv((h + dh + 360 * 2) % 360, inrange(s + ds, 0, 255),
inrange(v + dv, 0, 255))
image.setPixel(x, y, color.rgb())
def notify(self, other: RemoteObj):
"""
<other> might be our predecessor
"""
p = self.predecessor()
if p is None:
self.set_predecessor(other)
other_ro = get_remote(other)
other_storage = other_ro.get_remote_storage()
# send all my keys between self.id and other.id to other
self.storage.release_tags(self.id, other_storage)
self.storage.release_file_tags(self.id, other_storage)
self.storage.release_files(self.id, other_storage)
elif inrange(other.id, p.id, self.id):
self.set_predecessor(other)
other_ro = get_remote(other)
other_storage = other_ro.get_remote_storage()
# send all my keys between p.id and other.id to other
self.storage.release_tags(p.id, other_storage)
self.storage.release_file_tags(p.id, other_storage)
self.storage.release_files(p.id, other_storage)
elif not self.ping(p):
self.set_predecessor(other)
# load in storage all key from backups between other.id p.id
self.storage.load_from_tags_backup(other.id, p.id)
self.storage.load_from_file_tags_backup(other.id, p.id)
self.storage.load_from_files_backup(other.id, p.id)
def load_from_files_backup(self, other_id: int, p_id: int):
load_keys = [key for key in self.files_backups.keys() if inrange(key, other_id, p_id, (False, True))]
print(f'Loading files {load_keys} from bakcup')
for file in load_keys:
self._del_backup_add_files(file)
def load_from_file_tags_backup(self, other_id: int, p_id: int):
load_keys = [key for key in self.file_tags_backups.keys() if inrange(hash_str(key), other_id, p_id, (False, True))]
print(f'Loading files {load_keys} from backup')
for file in load_keys:
tag_list = self.file_tags_backups.pop(file)
self.file_tags[file] = tag_list
def load_from_tags_backup(self, other_id: int, p_id: int):
load_keys = [key for key in self.tags_backups.keys() if inrange(key, other_id, p_id, (False, True))]
print(f'Loading tags {load_keys} from bakcup')
for tag in load_keys:
file_list = self.tags_backups.pop(tag)
self.tags[tag] = file_list
def closest_preceding_finger(self, id: int) -> RemoteObj:
"""
Return closest finger preceding id
"""
for i in reversed(range(M)):
node = self.get_finger(i)
if self.ping(node) and inrange(node.id, self.id, id):
return node
return self.get_info()
def release_file_tags(self, p_id: int, remote_storage):
release_keys = [key for key in self.file_tags.keys() if inrange(hash_str(key), p_id, remote_storage.id, (False, True))]
print(f'Releasing files {release_keys} to {remote_storage.id}')
try:
remote_storage_ro = get_remote(remote_storage)
for file in release_keys:
tag_list = self.file_tags.pop(file)
remote_storage_ro.add_file_to_tags(file, tag_list)
except Exception as ex:
print(ex)
def release_tags(self, p_id: int, remote_storage):
release_keys = [key for key in self.tags.keys() if inrange(key, p_id, remote_storage.id, (False, True))]
print(f'Releasing tags {release_keys} to {remote_storage.id}')
try:
remote_storage_ro = get_remote(remote_storage)
for tag in release_keys:
file_list = self.tags.pop(tag)
remote_storage_ro.add_tag_to_files(tag, file_list)
except Exception as ex:
print(ex)
def release_files(self, p_id: int, remote_storage):
release_keys = [key for key in self.files.keys() if inrange(key, p_id, remote_storage.id, (False, True))]
print(f'Releasing files {release_keys} to {remote_storage.id}')
try:
remote_storage_ro = get_remote(remote_storage)
for file in release_keys:
realname = self.files.pop(file)
self.files_backups[file] = realname
remote_storage_ro.upload_to_files(realname, self.ip, self.port)
except Exception as ex:
print(ex)
def stabilize(self):
"""
Periodically verify inmediate successor,
and tell the successor about this node
"""
if not self.ping(self.successor_list[0]):
return
s = self.successor()
s_ro = get_remote(s)
x = s_ro.predecessor()
if x is not None and inrange(x.id, self.id, s.id):
self.set_successor(x)
s = self.successor()
get_remote(s).notify(self.get_info())
def find_predecessor(self, id: int) -> RemoteObj:
"""
Ask node to find id’s predecessor
"""
# corner case
# if self.id() == id:
# return self.predecessor()
p = self.get_info()
p_ro = get_remote(p)
while not inrange(id, p.id, p_ro.successor().id, (False, True)):
np = p_ro.closest_preceding_finger(id)
# corner case
# if p.id() == np.id():
# break
p = np
p_ro = get_remote(p)
return p
def estimate_speed(word_lists,
frame_numbers,
min_speed=0.05,
max_speed=0.6,
height=None,
**kwargs):
"""
Returns speed estimate of sliding ticker in pixels/frame.
word_lists - Lists of words and their positions.
frame_numbers - List of frame numbers corresponding to each word list.
min_speed - Minimum possible speed of text as fraction of word height.
max_speed = Maximum possible speed of text as fraction of word height.
"""
#Estimate movement speed of ticker, by looking at position of the same
#word in consecutive images.
estimate_sum = 0
estimate_count = 0
"""
#Find a word
height = - 1
for word_list in word_lists:
for word in word_list:
if len(word['text']) >= 3:
height = word['bottom'] - word['top'] + 1
break
if height != - 1:
break
else:
raise ValueError("Cannot estimate speed if there are no words in word_lists!")
"""
#Iterate over every pair of neighbouring frames.
for i in range(len(frame_numbers) - 1):
word_list1 = word_lists[i]
word_list2 = word_lists[i + 1]
frame_diff = frame_numbers[i + 1] - frame_numbers[i]
#Min and max allowable movement of word.
min_diff = min_speed * height * frame_diff
max_diff = max_speed * height * frame_diff
#Iterate over all words in neighbouring frames.
for word1 in word_list1:
for word2 in word_list2:
left_diff = word1['left'] - word2['left']
right_diff = word1['right'] - word2['right']
#Check that is same word.
if not word1['text'] == word2['text']:
continue
#Check that text has moved a reasonable amount.
if not inrange(left_diff, min_diff, max_diff):
continue
if not inrange(right_diff, min_diff, max_diff):
continue
#Check that word is long enough to probably not be coincidence.
if not len(word1['text']) >= 3:
continue
#Calculate a speed estimate from word pair
pixel_diff = word1['left'] - word2['left']
estimate = pixel_diff / frame_diff
estimate_sum += estimate
estimate_count += 1
return estimate_sum / estimate_count